So far, there have been no reported illnesses, but health officials advise those with a peanut allergy to not eat these products and discard them.

No illnesses have been reported as of July 8 over the recall.

The problem described in Mondelēz Global’s recall notice sounds like a simple oopsy — individual six-packs of Peanut Butter Cracker Sandwiches in wrapping for Cheese Cracker Sandwiches — but can have...